Improved elasiic pitman for stone-channelling- machine



itinitd gisten @met @Wina GEORGE J. WARDWEEL, OE RUTLAND, VERMONT,AssieNoR To CUTTER COMPANY, OE NEW YORK OITY.

THE STEAM STONE- Letters Patent No. 93,650, dated August 10, 1869. l

*w- IMPROVED ELAS'IIC PITMAN FOR STONE-CHANNELLING- MACINE.

The ISchedule referred to in these Letters Patent and making part Cn.'the Same- To all whom it may concernr Be it known that I, GEORGE J.WARDWELL, of Rutland, in the county of Rutland, and State of Vermont,have invented a new and improved Pitman- Oonnection forStone-Channelling Gutters; and I do hereby declare that the following isa full, clear, and exact description thereof, reference being had to theaccompanying drawings, making part of this specification, in which-Figure l is a side view of my improved pitman-connection applied to thewrist-pin of a crank-wheel.

Figure 2 is an edgeview of the same, also showing the manner ofconnecting the arms ofthe pitman to a gang of cutters.

Figures 3 and 4 are views of a modilication of the pitman offigs. 1 and2. Similar letters of reference indicate corresponding parte in theseveral figures.

In the schedule annexed to my Letters Patent dated on the 18th day ofMay, 1869, I described an elastic pitman, which consisted of two leversof unequal length pivoted together, with a spring applied between them,which pitman was used for connecting the gang of cut.- ters to awrist-pinoli the crank-wheel that communicated through said pitman arectilinear reciprocating motion to the cutters. The spring was arrangedbelow the fulcrun'i of the levers and Wrist-pin, and was conipressed bythe `drawing togetherotl the free ends of the levers. p

The nature of this invention consists in a pitmanconnection, composedoftwo levers of equal length, with the spring or springs arranged abovetheir fulcrum or wrist-pin connection, as will be hereinafter explained.

To enable others skilled in the art to understand my invention, I willdescribe its construction and operation.

In theaccompanying drawings- A represents a drivingesliaftI which isarranged in a horizontal 'plane across one end of the steam-channellingcarriage, and carries ay crank-wheel, B, as described in my LettersPatent, dntcdon the 18th day of May, 1869.

At a suitable point ou the face of the wheel B isa fixed or adjustablewrist-pin, a, which receives upon it two levers, C C, and serves as thevfulcrum for these levers. y

The yoke b or other equivalent device `is used to prevent the leversfrom slipping ofi' the wrist-pin a.

It will be seen that the levers C C are of equal length, and that theydo not `cross one another, but are connected to the wrist-pin a lby earsformed on them; hence, when the longest arms are pressed together, theshortest arms will be separated, and 'vice tersa.

To these levers C C, springs c c are rigidly secured, which rise abovethe wrist-pin a, and fo'rm elastic extensions of the shortestarms.

These springs c c may be made of a number of straight plates securedtogether with their outer ends hooked outwardly to receive the tie-loopd, which connects these ends together.

The lower or longest arms of levers C C are con-` nected to a block, g,by means of links h h, which block is used to connect the links to thecutters E. 'Ihe links'are looselyattached to the levers. and also totheabove said pin, have a spring, c, of India rubber, conlined betweenthem, so as to be compressed by the pressing together ofthe longestarn'is.

It will be secu from the above description that I I have provided forapplying a spring to the levers above their point oi' connection to thewrist-pin a, consequently I am enabled to make the levers shorter with agiven amount of elastic play than would be the case 4if the spring wasapplied between the longest arms of the levers below the said wrist-pin.

I do not confine myself` to the crank-wheel B, in combination with theimproved pitman, as this pitman may be connected to a wrist-pin, a, on arectilinear reciprocating cross-head, as described in my application fora patent marked A, and bearing even dato with the tiling of this.

Having described my invention,

WhatI claim as new, and desire to secure by Letters Patent, is-

J ointed levers C G, provided with links h h on ltheir longest arms, and.with a spring arranged above their fulcrum, substantially as setforth'and for thc purposes described.

GEO. J. WARDWELL. Witnesses G. CLARK, O. W. SAFFORD.

